A great starting point on some of the basics of data science and machine learning is the Data Skeptic. Great interviews with academics and practitioners as well as short 10–15 minute episodes where the hosts give a short primer on topics like this one one on deep learning. Pretty nerdy though.

Ben Evans: P&G cut digital ad spending by $140m last quarter, driven by concerns on metrics, viewability and fraud. No impact on revenue. Some of this is to pressure Google and FB but you could certainly also see this as a canary in the coal mine: the online ad space is not healthy.